JSON Flatten
Flatten nested JSON objects into a single level of key-value pairs with a custom separator.
How to use
JSON Flatten is a free online tool in our developer tools collection. Flatten nested JSON objects into a single level of key-value pairs with a custom separator. Just enter or upload your content above and the result updates instantly — copy or download it in one click. No signup, no installation, and everything runs locally in your browser: your files are never uploaded to any server.
Frequently Asked Questions
How do I use JSON Flatten?
Flatten nested JSON objects into a single level of key-value pairs with a custom separator.. Open the tool above, enter or upload your content, and the result appears instantly — then copy or download it. No signup required.
Is JSON Flatten free?
Yes. JSON Flatten is completely free with no signup, no login and no usage limit. You can use it as often as you like.
Do I need to upload my files? Is my data safe?
No upload needed. Every tool on Wevva Tools runs locally in your browser, so your files and text never leave your device — nothing is stored on our servers.
Support Us
If this tool helps you, feel free to scan the QR code to support our development.
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